# JNTU Kakinada B-Tech 3-2 RT32011 I ENVIRONMENTAL ENGINEERING – I R13 April 2018 Question Paper

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I (Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is meant by the term per capita demand? [3M]
b) Differentiate between confined and unconfined aquifers. [4M]
c) Define air valves. What is the purpose of providing air valves? [4M]
d) Define specific conductivity of water. [3M]
e) Define break point chlorination and double chlorination. [4M]
f) What are the advantages of cast iron pipes? [4M]
PART -B
2 a) Mention and discuss the factors that influence per capita demand. [4M]
b) What do you understand by continuous and intermittent system of water supply?
[8M]
c) Explain the importance and necessity for planned water supplies.
[4M]
3 a) Define an intake structure. What are the factors governing the location of an intake? [8M]
b) Explain about pipe appurtenances which are provided at various suitable places
along the pipe lines.
[8M]
4 a) What are the common impurities found in natural sources of water, and explain
their effects up on its quality.
[8M]
b) Explain about IS (Indian Standard) drinking water quality standards and WHO
guidelines for drinking water.
[8M]
5 a) Explain about operation and cleaning of slow sand filters. [8M]
b) Design six slow sand filter beds from the following data:
Population to be served = 50,000 persons.
Per capita demand = 150 lt/head/day.
Rate of filtration = 180 lt/hr/sq.m.
Length of each bed = Twice the breadth.
Assume maximum demand as 1.8 times the average daily demand. Also assume
that one unit, out of six, will be kept as stand-by.
[8M]
6 a) Explain about any three minor methods of disinfection. [8M]
b) What are the various forms in which chlorine can be applied? Discuss. [8M]
7 a) Explain about grid iron system with neat sketch. [8M]
b) Discuss about laying and testing of pipe lines. [8M]
*****
R13
SET – 1

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I (Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is meant by the term per capita demand? [3M]
b) Differentiate between confined and unconfined aquifers. [4M]
c) Define air valves. What is the purpose of providing air valves? [4M]
d) Define specific conductivity of water. [3M]
e) Define break point chlorination and double chlorination. [4M]
f) What are the advantages of cast iron pipes? [4M]
PART -B
2 a) Mention and discuss the factors that influence per capita demand. [4M]
b) What do you understand by continuous and intermittent system of water supply?
[8M]
c) Explain the importance and necessity for planned water supplies.
[4M]
3 a) Define an intake structure. What are the factors governing the location of an intake? [8M]
b) Explain about pipe appurtenances which are provided at various suitable places
along the pipe lines.
[8M]
4 a) What are the common impurities found in natural sources of water, and explain
their effects up on its quality.
[8M]
b) Explain about IS (Indian Standard) drinking water quality standards and WHO
guidelines for drinking water.
[8M]
5 a) Explain about operation and cleaning of slow sand filters. [8M]
b) Design six slow sand filter beds from the following data:
Population to be served = 50,000 persons.
Per capita demand = 150 lt/head/day.
Rate of filtration = 180 lt/hr/sq.m.
Length of each bed = Twice the breadth.
Assume maximum demand as 1.8 times the average daily demand. Also assume
that one unit, out of six, will be kept as stand-by.
[8M]
6 a) Explain about any three minor methods of disinfection. [8M]
b) What are the various forms in which chlorine can be applied? Discuss. [8M]
7 a) Explain about grid iron system with neat sketch. [8M]
b) Discuss about laying and testing of pipe lines. [8M]
*****
R13
SET – 1

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is the difference between arithmetic increase method and geometric increase
method?
[3M]
b) What do you mean by perched aquifer? [4M]
c) Define pressure relief valves. What is the purpose of providing pressure relief
valves?
[4M]
d) Define BOD. [4M]
e) Define super chlorination. [3M]
f) What do you mean by socket and spigot joint? [4M]
PART -B
2 a) What are the factors governing the design period? [4M]
b) Compute the population of the year 2000 and 2018 for a city whose population in
the year 1930 was 25,000 and in the year 1970 was 47,000. Make use of geometric
increase method.
[8M]
c) Explain about master plan method.
[4M]
3 a) What are intake towers? Differentiate between dry and wet intake towers. [8M]
b) Explain about the classification of river intake structures.
[8M]
4 a) Explain about water borne diseases and their control. [8M]
b) Explain about physical characteristics of water.
[8M]
5 a) Explain about roughening and diatomaceous earth filters. [8M]
b) Discuss about theory of filtration.
[8M]
6 a) Explain about orthotolidine and D.P.D test. [8M]
b) What are the methods of removing temporary hardness? Discuss in detail.
[8M]

*****
R13
SET – 2

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I (Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is meant by the term per capita demand? [3M]
b) Differentiate between confined and unconfined aquifers. [4M]
c) Define air valves. What is the purpose of providing air valves? [4M]
d) Define specific conductivity of water. [3M]
e) Define break point chlorination and double chlorination. [4M]
f) What are the advantages of cast iron pipes? [4M]
PART -B
2 a) Mention and discuss the factors that influence per capita demand. [4M]
b) What do you understand by continuous and intermittent system of water supply?
[8M]
c) Explain the importance and necessity for planned water supplies.
[4M]
3 a) Define an intake structure. What are the factors governing the location of an intake? [8M]
b) Explain about pipe appurtenances which are provided at various suitable places
along the pipe lines.
[8M]
4 a) What are the common impurities found in natural sources of water, and explain
their effects up on its quality.
[8M]
b) Explain about IS (Indian Standard) drinking water quality standards and WHO
guidelines for drinking water.
[8M]
5 a) Explain about operation and cleaning of slow sand filters. [8M]
b) Design six slow sand filter beds from the following data:
Population to be served = 50,000 persons.
Per capita demand = 150 lt/head/day.
Rate of filtration = 180 lt/hr/sq.m.
Length of each bed = Twice the breadth.
Assume maximum demand as 1.8 times the average daily demand. Also assume
that one unit, out of six, will be kept as stand-by.
[8M]
6 a) Explain about any three minor methods of disinfection. [8M]
b) What are the various forms in which chlorine can be applied? Discuss. [8M]
7 a) Explain about grid iron system with neat sketch. [8M]
b) Discuss about laying and testing of pipe lines. [8M]
*****
R13
SET – 1

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is the difference between arithmetic increase method and geometric increase
method?
[3M]
b) What do you mean by perched aquifer? [4M]
c) Define pressure relief valves. What is the purpose of providing pressure relief
valves?
[4M]
d) Define BOD. [4M]
e) Define super chlorination. [3M]
f) What do you mean by socket and spigot joint? [4M]
PART -B
2 a) What are the factors governing the design period? [4M]
b) Compute the population of the year 2000 and 2018 for a city whose population in
the year 1930 was 25,000 and in the year 1970 was 47,000. Make use of geometric
increase method.
[8M]
c) Explain about master plan method.
[4M]
3 a) What are intake towers? Differentiate between dry and wet intake towers. [8M]
b) Explain about the classification of river intake structures.
[8M]
4 a) Explain about water borne diseases and their control. [8M]
b) Explain about physical characteristics of water.
[8M]
5 a) Explain about roughening and diatomaceous earth filters. [8M]
b) Discuss about theory of filtration.
[8M]
6 a) Explain about orthotolidine and D.P.D test. [8M]
b) What are the methods of removing temporary hardness? Discuss in detail.
[8M]

*****
R13
SET – 2

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) Write a short note on provision for fire demand in water supply. [3M]
b) What is the difference between aquifuge and aquitard? [4M]
c) Define check valves. [3M]
d) What do you mean by water borne diseases? Mention the names of diseases
that are caused by bacterial and protozoal infections.
[4M]
e) Define zeolite. [4M]
f) What is the purpose of providing expansion joints? [4M]
PART ?B
2 a) Discuss the logistic curve method for determining the future populations of a
locality. Derive a standard equation for such a curve and explain its use for
determining the future population.
[8M]
b) In two periods each of 20 years, a city has grown from 40,000 to 1, 60,000 and
then 2, 80,000. Determine (i) saturation population (ii) equation of logistic
curve and (iii) expected population after the next 15 years.
[8M]
3 a) Give an equation defining Darcy?s law. What is its limitation? [8M]
b) What are infiltration galleries and infiltration wells? Explain both with neat
sketches. Also define a ranney well.
[8M]
4 a) How does water quality criteria differs for industrial supplies from those for
domestic municipal supplies?
[8M]
b) Explain why bacteriological test should be necessary in handling problems of
water supply.
[8M]
5 a) Differentiate between slow sand and rapid gravity filters. [8M]
[8M]
6 a) Explain about lime ? soda process for removing hardness. [8M]
b) Explain about desalination by electrodialysis method.
[8M]
7 a) Explain the Hardy cross method used for pipe network analysis in water
distribution system.
[8M]
b) What are the requirements of a good distribution system? [8M]
*****

R13
SET – 3

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I (Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is meant by the term per capita demand? [3M]
b) Differentiate between confined and unconfined aquifers. [4M]
c) Define air valves. What is the purpose of providing air valves? [4M]
d) Define specific conductivity of water. [3M]
e) Define break point chlorination and double chlorination. [4M]
f) What are the advantages of cast iron pipes? [4M]
PART -B
2 a) Mention and discuss the factors that influence per capita demand. [4M]
b) What do you understand by continuous and intermittent system of water supply?
[8M]
c) Explain the importance and necessity for planned water supplies.
[4M]
3 a) Define an intake structure. What are the factors governing the location of an intake? [8M]
b) Explain about pipe appurtenances which are provided at various suitable places
along the pipe lines.
[8M]
4 a) What are the common impurities found in natural sources of water, and explain
their effects up on its quality.
[8M]
b) Explain about IS (Indian Standard) drinking water quality standards and WHO
guidelines for drinking water.
[8M]
5 a) Explain about operation and cleaning of slow sand filters. [8M]
b) Design six slow sand filter beds from the following data:
Population to be served = 50,000 persons.
Per capita demand = 150 lt/head/day.
Rate of filtration = 180 lt/hr/sq.m.
Length of each bed = Twice the breadth.
Assume maximum demand as 1.8 times the average daily demand. Also assume
that one unit, out of six, will be kept as stand-by.
[8M]
6 a) Explain about any three minor methods of disinfection. [8M]
b) What are the various forms in which chlorine can be applied? Discuss. [8M]
7 a) Explain about grid iron system with neat sketch. [8M]
b) Discuss about laying and testing of pipe lines. [8M]
*****
R13
SET – 1

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is the difference between arithmetic increase method and geometric increase
method?
[3M]
b) What do you mean by perched aquifer? [4M]
c) Define pressure relief valves. What is the purpose of providing pressure relief
valves?
[4M]
d) Define BOD. [4M]
e) Define super chlorination. [3M]
f) What do you mean by socket and spigot joint? [4M]
PART -B
2 a) What are the factors governing the design period? [4M]
b) Compute the population of the year 2000 and 2018 for a city whose population in
the year 1930 was 25,000 and in the year 1970 was 47,000. Make use of geometric
increase method.
[8M]
c) Explain about master plan method.
[4M]
3 a) What are intake towers? Differentiate between dry and wet intake towers. [8M]
b) Explain about the classification of river intake structures.
[8M]
4 a) Explain about water borne diseases and their control. [8M]
b) Explain about physical characteristics of water.
[8M]
5 a) Explain about roughening and diatomaceous earth filters. [8M]
b) Discuss about theory of filtration.
[8M]
6 a) Explain about orthotolidine and D.P.D test. [8M]
b) What are the methods of removing temporary hardness? Discuss in detail.
[8M]

*****
R13
SET – 2

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) Write a short note on provision for fire demand in water supply. [3M]
b) What is the difference between aquifuge and aquitard? [4M]
c) Define check valves. [3M]
d) What do you mean by water borne diseases? Mention the names of diseases
that are caused by bacterial and protozoal infections.
[4M]
e) Define zeolite. [4M]
f) What is the purpose of providing expansion joints? [4M]
PART ?B
2 a) Discuss the logistic curve method for determining the future populations of a
locality. Derive a standard equation for such a curve and explain its use for
determining the future population.
[8M]
b) In two periods each of 20 years, a city has grown from 40,000 to 1, 60,000 and
then 2, 80,000. Determine (i) saturation population (ii) equation of logistic
curve and (iii) expected population after the next 15 years.
[8M]
3 a) Give an equation defining Darcy?s law. What is its limitation? [8M]
b) What are infiltration galleries and infiltration wells? Explain both with neat
sketches. Also define a ranney well.
[8M]
4 a) How does water quality criteria differs for industrial supplies from those for
domestic municipal supplies?
[8M]
b) Explain why bacteriological test should be necessary in handling problems of
water supply.
[8M]
5 a) Differentiate between slow sand and rapid gravity filters. [8M]
[8M]
6 a) Explain about lime ? soda process for removing hardness. [8M]
b) Explain about desalination by electrodialysis method.
[8M]
7 a) Explain the Hardy cross method used for pipe network analysis in water
distribution system.
[8M]
b) What are the requirements of a good distribution system? [8M]
*****

R13
SET – 3

Code No: RT32011
III B. Tech II Semester Regular/Supplementary Examinations, April -2018
ENVIRONMENTAL ENGINEERING ? I
(Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B)2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
*****
PART ?A
1 a) What is meant by coincident draft? [3M]
b) Define cyclonic precipitation. [4M]
c) Define turbidity. [3M]
d) What are the maximum acceptable limits of
i)Turbidity ii)Fluorides iii)Nitrates and iv)Phenolic substances, in drinking water.
[4M]
e) Distinguish between slow sand and rapid sand filters with reference to method of
cleaning.
[4M]
f) Define flexible joint and flanged joint. [4M]
PART ?B
2 a) Explain the different methods of forecasting future population of a city for which a
water supply scheme is to be planned.
[8M]
b) Given the following data, calculate the population at the end of next three decades
by decreasing rate method.
Year Population
1940 80,000
1950 1,20,000
1960 1,68,000
1970 2,28,580
[8M]
3 a) Enumerate the various surface sources of water, and discuss and compare the
quality and quantity of water supplies that may be available from these sources.
[8M]
b) What are the factors governing the selection of dam site.
[8M]
4 Explain about chemical characteristics of water.
[16M]
5 a) Explain about working and cleaning of rapid gravity filters. [8M]
b) Discuss about operational troubles in rapid gravity filters.
[8M]
6 a) Explain about zeolite process for removing hardness. [8M]
b) What do you mean by desalination? Explain about desalination by reverse osmosis
process.
[8M]
[16M]
*****
R13
SET – 4

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